document.write( "Question 360786: a spinner has regions numbered 1 through 21. what is the probability that the spinner will stop on an even number or a mulitiple of 3? reduce fraction if necessary. \n" ); document.write( "
Algebra.Com's Answer #257452 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! a spinner has regions numbered 1 through 21. what is the probability that the spinner will stop on an even number or a mulitiple of 3? reduce fraction if necessary. \n" ); document.write( "---- \n" ); document.write( "Even: 2,4,6,8,10,12,14,16,18,20: 10 ways \n" ); document.write( "Even and multiple of 3: 6,12,18: 3 ways \n" ); document.write( "Multiples of 3: 3,6,9,12,15,18,21: 7 ways \n" ); document.write( "--- \n" ); document.write( "Possible results: 21 \n" ); document.write( "---- \n" ); document.write( "P(even or multiple of 3) = P(even) + P(multiple) - P(even and multiple of 3) \n" ); document.write( "--- \n" ); document.write( "= (10 + 7 - 3)/21 = 14/21 = 2/3 \n" ); document.write( "================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "================================== \n" ); document.write( "= \n" ); document.write( " |